Question

what might can be an open question that a writer would ask of a peer reviewer regarding her introduction

Answer 1

The question should be revolving around if when they read the introduction did it immerse themselves in the paper and if they desired to read more.

if so a nice response would be:

"Your introduction caught my attention in forthwith(immediately) time."

If not, ask them for pointers to hook you into the paper.

Answer 2

A question to ask may be if the introduction makes sense